Tethering and Proofing Corporate Headshots

Hi All,

Please forgive me if this has already been addressed, but I still can't seem to solve the mystery. Do any of you have recommendations for apps that allow for large volume headshot proofing onsite? Specifically something that integrates with a workflow like Lightroom? I'd like an ipad station setup for people to enter in their email/contact info and select proofs immediately after sitting for a portrait. Convention style. Any suggestions or workflows you'd like to share is much appreciated.